Amos dickerman



(No Model.)

A; DIGKERMAN.

BREEGH LOADING FIRE ARM. No. 323,501. Patented Aug-4. 1885 l/Llitna sses: II-HJEHTUK 10mm!) 0. wM

UNITED STATES PATENT 'OFFICE.

All/IOS DICKERMAN, OF NEW HAVEN, CONNECTICUT.

BREECH-LOADING FIRE-ARM.

SPECIFICATION forming part of Letters Patent No. 323,501, dated August 4, 1885.

Application filed February 24. 18?.5. 7 (No model.)

To all whom it may concern:

Be it knownthat I, AMos DICKERMAN, a citizen of the United States, residing at New Haven, in the county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Fire-Arms, of which the following isa specification, reference being had therein to the accompanying drawings, in which- 'Figure 1 is an elevation of the breechblock or receiver of my improved firearm, and Fig. 2 is a view of the same with the cap removed. Fig. 3 is a plan view of the under side of the firing-pin. Fig. 4 is an elevation of the bolt which looks the barrel. Fig. 5 is a perspective view ofthe safety-plate, and Fig. 6 is an end view of apartof thelever and cams.

My invention relates to breech-loading firearms, and to that class of guns which are called hammerless. V

The invention consists in improved means for unlocking the barrel, cocking the firingpin, and locking the trigger, whereby these three operations are performed by a single movement of the lever, as the same is hereinafter more fully described and explained.

To enable others to make and use my improved gun, I will give a detailed description of the same so far as such description is necessary to understand myimprovements.

The breech-block or receiver A is made in the usual form, and has the recess B to receive the locking mechanism, and the parts C C to which the stock is attached. To its front end the barrel ispivoted. In the rear end of the receiver a threaded perforation is made to allow of the insertion of the firing-pin, which is filled by a threaded plug which may be turned so as to adjust the tension of the spring actuating the firing-pin. In the front end of the receiver a rectangular groove is made to receive the bolt which locks the barrel. In its lower edge perforations are made for the trigvger and that part of the locking-plate which extends downward through the under side of the receiver. The cap D fits onto the receiver over the recess and is held in place by screws. The lever E is made in two parts, a and b,

the part b being cylindrical. The part b has the earns a and (I, which actuate the unlockingbolt and firing-pin.

It also has the cam or projection e, against which a spring comes to bring the part a back in line with the barrel.

It turns on the cylindrical part in bearings made in the receiver and cap D.

The firing-pin F is made in three parts, 9, h, and i. The front part, 9, or firing-pin proper, is made of the usual size and form, and may be screwed into the rectangular part or made integral with it as preferred. This part of the pin moves in the perforation in the receiver indicated by the broken lines. The rectangular part h has a slot, f, to allow its movement on a stud, and notches or bents 63 jj. It also has theincline Z, against which the cam (2 comes to move the pin. The part a is cylindrical and integral with the part It and extends through the threaded plug, and on it and between the plug and the rectangular part of the pin a spiral spring is placed to actuate the pin.

The bolt m,lockin g the barrel, is rectangular and moves in the rectangular groove in the receiver. Near its back end a transverse rectangular groove is formed in which th'ecain c operates to move the bolt.

The trigger H has the hook at to fit in the notches in the firing-pin, and a shoulder on which a spring rests to actuate it, and is pivoted to the receiver. It also has the part 0, under which the safety-plate comes to lock the trigger.

The safety-plate J is rectangular and has its back part beveled. It has the rectangular projection 19, against which thebolt comes to move the plate, and the downwardly-projecting part r, against which the finger comes to unlock the trigger. It also has the inclined or curved surfaces 8 and t, the surface 8 being made so steep that the spring a acting on it will move the plate under the trigger as the hook on the trigger drops into the notch in the firing-pin, the surface t being so steep that the spring acting on it will hold the plate forward 95 and prevent its getting under the trigger and prevent the working of the gun.

The several parts of the locking mechanism being constructed as above described, as the lever is moved to the right the cam (1 comes against the incline Z on the firing-pin, moves it back, and cooks the pin, as shown in Fig. 2. By the same movement the cam 0 moves back the bolt and unlocks the barrel, the movement of the bolt moving the safety-plate to a posi- I 5 act, respectively, on the bolt and firing mechanism to retract them, and an arm or projection, 6, together with a spring which bears against said arm to return the lever to its normal position, substantially as set forth.

2. A firing-pin consisting of a front and rear part which are circular in cross-section, and a longitudinally-slotted middle part which is provided with sear-notches and an incline or cam face, in combination with a supportingstud which extends into said slot, a spring which actuates said firing-pin, a trigger which engages with either one of said notches, and an arm or cam on the top lever which acts on the cam or incline upon said firing-pin to force it backward against the tension of said spring, substantially as set forth.

3. In combination with a barrel locking bolt, trigger, and trigger-spring, a sliding locking-plate having an upright partengaging r the bolt, whereby the plate is moved by said bolt, an inclined or curved part, and a spring acting on the incline to further move the bolt and lock the trigger, and a downwardly-projecting handle whereby the trigger is unlocked, substantially as set forth.

- 4. The receiver having a screwthreaded perforation in its rear end, in combination with a firing-pin which extends through said perforation, a spring which actuates said firing-pin, and a screw-plug which engages with the threads of said perforation and bears against said spring for the purpose of adjusting the tension of the latter by screwing said plug in or out, substantially as set fort-h.

5. A firing-pin provided with notches and an incline, as described, in combination with a spring-actuated trigger which engages one of said notches and a lever having a vertical axially-movable part, b, which is provided with a cam that acts on said incline to withdraw said firing-pin when said part b is turned, and a second cam, together with a spring bearing on the same, to return the ,lever to its normal position, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

AMOS DIGKERMAN.

Witnesses:

GEORGE TERRY, GEORGE P. SALISBURY. 

